There are
953 mi
from Simi Valley, CA to Lake Oswego, OR
That's the driving distance. It would take 17 hours 59 mins to go from Simi Valley, California to Lake Oswego, Oregon.
The flight distance (direct flight from Simi Valley, CA to Lake Oswego, OR) is 797.37 mi.
953 mi = 1,533.31 kms